Acoustical horn



FIG. 1 is a front perspective view of an acoustical horn design showing my new design; and,

FIG. 2 is a front elevational view thereof.

The broken lines showing the enclosure in FIGS. 1 and 2 are merely illustrative of the environment of use and are not part of the claimed design. 

The ornamental design for an acoustical horn, as shown and described. 